MAD Scientist made a new power adaptor for the Commodore C64. He uses a standard power supply from the PC with a Molex connector that has 5 VDC and 12 VDC. His adaptor makes 9 VAC from the 12 VDC and together with the 5 VDC it is connected to the Commodore C64. You can follow the progress on the Forum64.de web page.